Straight-way valve and casing



,(No Model.) l

G.L.B,RADLEY STRAIGHT WAY VALVE AND GASING. Y

101260,829. A Patented July 11, 1832.-

` gilnesses.. I 4 l Inv/62de?! UNITED STATES y PATENT OFFICE.

GILBERT L. BRADLEY; OF NEW BEDFORD, MASSACHUSETTS.

STRAIGHT-WAY VALVE AND CASING.

SFECIFICATION forming part of Letters PatentrNo. 260,829, dated July 11,1882.

' Application iiled March 31, 1882. (No model.)

To all whom, it .may concern Be it known that I, GILBERT L. BRADLEY, acitizen of the 'United States, residing at New Bedford, in the county ofBristol and State of Massachusetts, have invented certain new and usefulImprovements in Straight-Way Valves and their Gasings, of which thefollowing is a specification.

This invention relates to thatclass ofstraight-Y way slide-valves inwhich the valve is provided with a series of rack-teeth, and a pinion isxed upon a rotary shaft so as to engage the rack-teeth and actuate theslide-valve.

The object of my invention is to provide, in connection with a valve ofsuch construction,

. an improved two-part valve-box which can be readily applied to ordisconnected from the pipes, and which can be made and sold as anoutside independent of any particular form of pipe, and withoutrequiring any change whatever in the construction of an ordinary pipe,

excepting that the ends of the pipes which connect with the valve box beexternally screw-threaded. This objectIattain by means of the devicesillustrated in the drawings, in which- Figure 1 is a vertical sectiontaken centrally through the valve-box and valve. Fig. 2 is a perspectiveview of the valve, and Fig. 3 represents'a modified construction ofvalve and valve-lever.

The valve-box A is preferably constructed with its top and sides in onepiece, the bottom a of this box-being secured to the upper portionthereof` by means of the bolts B, which will pass through a ange, a',surrounding the top of the box, and also through the detachable bottom,which extends beyond the sides of the box, as illustrated in Fig. 1,these said two parts of the box being held firmly together by tighteningup against the bottom the nuts' C, that are fitted upon thescrew-threaded ends ot' the tie-bolts. The top and bottom of the box areeach providedwitha screw-threaded socket, a2, for coupling the same withthe steam-pipes. These sockets are loca-ted near one end of the box, sothat space will be left within the latter at one side of a direct linebetween the two steam-ports for lthe device cmployed to slide the valve,this construction also providing a seat, D, upon the bottom'of the boxfor the valve to rest and slide upon in opening the valve.

The valve E consists of a fiat rectangular block dressed smooth upon itsunder side, and upon its upper side provided with a rack set oi' teeth,c. The valve-lever F, by which this valve is controlled, is located atone side of the box, upon a rock-shaft, Gr, which passes transverselythrough the box and has its bearings inY the vertical sides thereof.

AY pinion, H, fixed upon this rock-shaft within the valve-box, engageswith the rack-teeth offthe valve, so that by operating the valvelever,in order to give apartial rotation to the pinion, the valve will beclosed over the steamport or slid back to open the same.

In the modification shown in Fig. 3 the pinion is dispensed with, and inlieu thereotl a' pendent arm, h, is secured to or formed with therock-shaft. This arm is received at its lower end in a concave seat thatis formed between the two projections e' upon' the top side of thevalve. It will be obvious that when the valve-lever in this instance isvibrated the valve will be caused to slide upon the bottom of the boxinthe manner described'in connection with Fig. 1. v

By unscrewing the nuts from the tie-rod the box can be taken apart andboth the valve and the valve-seat dressed as occasion may require.

From the foregoing it will be seen that the pipes are ot' ordinaryshape, and that no change in their construction is required, wherebythere will be no increase of cost in their manufacture, the merescrew-threading their ends being effected at anominal cost. Thevalve-box is made complete in itself', and by having the screwthreadedsockets it can be readily connected with or detached from the pipes. Itcan also be made and sold separately from the pipes, and its bottom canat any time be detached, so that the valve-seat thereon can be easilydressed.

Having thus described I claim is- The combination of the straight-wayslidevalve having rack-teeth, and the pinion fixed upon a rock-shaft andengaging the teeth of said valve, with the hereimdescribed two-part yinvention, what valve-box A, constructed with a detachable which thedetachable bottom is secured by 11a-nd in the presence of thesubscribing witholts and nuts, each of said two parts being nesses.provided with u steam-port, and with u serew- 1 threaded socket, a2, forconnecting with the (IILBERTL L' BhADLEY 5 end of u pipe, said membersbeing constructed I Witnesses:

und organized us shown und specified. y WALTER A. JENNEY,

In testimony whereof I have hereunto set my Tuos. M. JAMES.

